<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<a href=""></a>
		<script type="text/javascript">
			//求出1-1/2 + 1/3 - 1/4 + 1/5....... 1/100的和
			var sum = 0;
			for(var i = 1; i <= 100; i++){
				//判断奇数，进行加法运算
				if (i % 2 != 0){
					sum += 1/i
				}else if(i % 2 === 0){
					sum -= 1/i
				}
			}
			console.log(sum);
		</script>
	</body>
</html>
